Erro ao inserir

Tipo de Mensagem: ALL - java.lang.NumberFormatException 
Horário: Mon Jul 31 15:46:54 BRT 2006 
 
Descrição: For input string: "" 
Detalhes:   URL:  http://localhost:8080/blankProject/cadSoftware.do
Referrer: http://localhost:8080/blankProject/cadSoftware.do

Parâmetro:   
fabricante: 8
desenvolvimento: 8
versoes: 8
metodo: insert
fornec: 
pacote: 8
versao: 8
observacao: 8
cjresp: 
resetForm: undefined
plataforma: 8
cbresp: 
sistemas: 8
lastMethod: showInsert
cjuser: 
beneficios: 8
cbuser: 
path: /blankProject
descricao: 8
id: 8
implicacao: 8
oquefaz: 8
soft: 8
renovacao: 88
chamados: 8
licenca: 8
negocio: 8

Stack Trace:   
java.lang.NumberFormatException: For input string: "" at java.lang.NumberFormatException.forInputString(NumberFormatException.java:48) at java.lang.Integer.parseInt(Integer.java:489) at java.lang.Integer.valueOf(Integer.java:574) at br.web.blankproject.view.action.cadastros.cadsoftware.SoftwareAction.insert(SoftwareAction.java:77) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:324) at org.apache.struts.actions.DispatchAction.dispatchMethod(DispatchAction.java:280) at br.web.action.BasicAction.dispatchMethod(BasicAction.java:155) at br.web.action.BasicAction.dispatch(BasicAction.java:128) at br.web.filter.FilterChain.doChain(FilterChain.java:60) at br.web.filter.paginate.PaginateFilter.doFilter(PaginateFilter.java:34) at br.web.filter.FilterChain.doChain(FilterChain.java:58) at br.web.action.BasicAction.execute(BasicAction.java:84) at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:484) at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:274) at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1482) at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:525) at javax.servlet.http.HttpServlet.service(HttpServlet.java:709) at javax.servlet.http.HttpServlet.service(HttpServlet.java:802) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:237) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:157) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:214) at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104) at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520) at org.apache.catalina.core.StandardContextValve.invokeInternal(StandardContextValve.java:198) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:152) at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104) at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:137) at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:118) at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:102) at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104) at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520) at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:929) at org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:160) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:799) at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:705) at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:577) at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:683) at java.lang.Thread.run(Thread.java:534)

String[] fornecs = request.getParameterValues("fornec");
        List listSoftwareFornecedor = new ArrayList();
        for(int i = 0; i < fornecs.length; i++) {
        	String codFornecedor = fornecs[i];
        	SoftwareFornecedorVO softwareFornecedor = new SoftwareFornecedorVO();
        	softwareFornecedor.setCodFornecedor(Integer.valueOf(codFornecedor));
        	listSoftwareFornecedor.add(codFornecedor);
        }
        softwareVO.setSoftwareFornecedor(listSoftwareFornecedor);

public class SoftwareFornecedorVO extends SoftwareVO {
	public Integer codSoftware;
	public Integer codFornecedor;
	
	public Integer getCodSoftware(){
		return codSoftware;
	}
	
	public void setCodSoftware(Integer codSoftware){
		this.codSoftware = codSoftware;
	}
	
	public Integer getCodFornecedor() {
		return codFornecedor;
	}
	
	public void setCodFornecedor(Integer codFornecedor){
		this.codFornecedor = codFornecedor;
	}
}